<?php // content="text/plain; charset=utf-8"
require_once ('../jpgraph.php');
require_once ('../jpgraph_canvas.php');
require_once ('../jpgraph_colormap.inc.php');

class ColorMapDriver {
	const WIDTH = 600; // Image width
	const LMARG = 90;  // Left margin
	const RMARG = 25;  // Right margin
	const MAPMARG = 35;  // Map margin between each map
	const MODHEIGHT = 30; // Module height (=Map height)
	const YSTART = 60; // Start coordinate for map list

	public function Draw($aTitle, $aStart, $aEnd, $n=64, $aReverse=false, $addColorNames = false ) {

		// Setup to draw colormap with names platoe colors
		$lmarg = ColorMapDriver::LMARG; // left margin
		$rmarg = ColorMapDriver::RMARG; // right margin
		$width = ColorMapDriver::WIDTH; // Overall image width

		// Module height
		$mh = ColorMapDriver::MODHEIGHT;

		// Step between each map
		$ymarg = $mh + ColorMapDriver::MAPMARG;

		if( $addColorNames ) {
			$ymarg += 50;
		}

		// Start position
		$xs=$lmarg; $ys=ColorMapDriver::YSTART;

		// Setup a basic canvas graph
		$height = ($aEnd-$aStart+1)*$ymarg+50;
		$graph = new CanvasGraph($width,$height);
		$graph->img->SetColor('darkgray');
		$graph->img->Rectangle(0,0,$width-1,$height-1);

		$t = new Text($aTitle, $width/2,5);
		$t->SetAlign('center','top');
		$t->SetFont(FF_ARIAL,FS_BOLD,14);
		$t->Stroke($graph->img);

		// Instantiate a colormap
		$cm = new ColorMap();
		$cm->InitRGB($graph->img->rgb);

		for( $mapidx=$aStart; $mapidx <= $aEnd; ++$mapidx, $ys += $ymarg ) {

			$cm->SetMap($mapidx,$aReverse);
			$n = $cm->SetNumColors($n);
			list( $mapidx, $maparray ) = $cm->GetCurrMap();
			$ncols = count($maparray);
			$colbuckets = $cm->GetBuckets();

			// The module width will depend on the actual number of colors
			$mw = round(($width-$lmarg-$rmarg)/$n);

			// Draw color map title (name)
			$t->Set('Basic colors: '.$ncols.',   Total colors: '.$n);
			$t->SetAlign('center','bottom');
			$t->SetAngle(0);
			$t->SetFont(FF_TIMES,FS_NORMAL,14);
			$t->Stroke($graph->img,$width/2,$ys-3);

			// Add the name/number of the map to the left
			$t->SetAlign('right','center');
			$t->Set('Map: '.$mapidx);
			$t->SetFont(FF_ARIAL,FS_NORMAL,14);
			$t->Stroke($graph->img,$xs-20,round($ys+$mh/2));

			// Setup text properties for the color names
			if( $addColorNames ) {
				$t->SetAngle(30);
				$t->SetFont(FF_ARIAL,FS_NORMAL,12);
				$t->SetAlign('right','top');
			}

			// Loop through all colors in the map
			$x = $xs; $y = $ys; $k=0;
			for($i=0; $i < $n; ++$i){
				$graph->img->SetColor($colbuckets[$i]);
				$graph->img->FilledRectangle($x,$y,$x+$mw,$y+$mh);

				// Mark all basic colors in the map with a bar and name
				if( $i % (($n-$ncols)/($ncols-1)+1) == 0 ) {
					$graph->img->SetColor('black');
					$graph->img->FilledRectangle($x,$y+$mh+4,$x+$mw-1,$y+$mh+6);
					if( $addColorNames ) {
						$t->Set($maparray[$k++]);
						$t->Stroke($graph->img,$x+$mw/2,$y+$mh+10);
					}
				}
				$x += $mw;
			}

			// Draw a border around the map
			$graph->img->SetColor('black');
			$graph->img->Rectangle($xs,$ys,$xs+$mw*$n,$ys+$mh);

		}

		// Send back to client
		$graph->Stroke();
	}

}

$driver = new ColorMapDriver();

$title = "Standard maps";
$reverse = false;
$n = 64; $s=0; $e=9;
$showNames = false;


/*
 $title = "Center maps";
 $reverse = false;
 $n = 64; $s=10; $e=14;
 $showNames = false;
 */

/*
 $title = "Continues maps";
 $reverse = false;
 $n = 64; $s=15; $e=21;
 $showNames = false;
 */
$driver->Draw($title,$s,$e,$n,$reverse,$showNames);

?>
